For the U.S., Kerry is to sign the agreement Friday and then President Obama will ratify it before he leaves office in December, a senior U.S. official told CBS News in a conference call this week.
Time Frame. The average dolphin species can stay underwater for as long as eight to 10 minutes; some can remain submerged while holding their breath for 15 minutes. Dolphins breathe through their blowhole, which has a muscular flap that covers it when they go under water, keeping water out of their lungs. Size.
In order for a dolphin to dive into the water without worrying about inhaling water when it is submerged the muscles surrounding the dolphins blowhole contract to prevent the dolphin from accidentally taking in any unwanted water. As far as how long a dolphin can hold its breath varies depending on the species. Some dolphins can only hold their breath for a few minutes (3 â 7 minutes) while underwater, while other species have been known to hold their breath for over 20 minutes during deep dives. Most of what is known about a dolphins ability to hold its breath is from observations of their dives.